fix: More clang-tidy issues found after merging to develop

[godexsoft]

High Level Overview of Change

This PR fixes issues that did not show up before we merged #6595

API Impact

No impact.

[codecov]

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.4%. Comparing base (0510ee4) to head (116b4db).
⚠️ Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/libxrpl/ledger/helpers/RippleStateHelpers.cpp	91.7%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6640     +/-   ##
=========================================
- Coverage     81.5%   81.4%   -0.0%     
=========================================
  Files          997     997             
  Lines        74408   74410      +2     
  Branches      7561    7556      -5     
=========================================
- Hits         60607   60606      -1     
- Misses       13801   13804      +3     

Files with missing lines	Coverage Δ
src/libxrpl/ledger/helpers/DirectoryHelpers.cpp	95.5% <100.0%> (ø)
src/libxrpl/ledger/helpers/TokenHelpers.cpp	93.5% <100.0%> (+<0.1%)	⬆️
src/libxrpl/ledger/helpers/RippleStateHelpers.cpp	92.4% <91.7%> (+<0.1%)	⬆️

... and 2 files with indirect coverage changes

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